package org.study.tomcat_study.demo.servlet.simple;

import java.io.File;
import java.io.IOException;
import java.net.URL;
import java.net.URLClassLoader;
import java.net.URLStreamHandler;

import javax.servlet.Servlet;
import javax.servlet.ServletException;

import org.study.tomcat_study.Constants;

public class ServletProcessor1 {
	
	public void process(Request request,Response response) {
		String uri = request.getUri();
		String servletName = uri.substring(uri.lastIndexOf("/")+1);
		URLClassLoader loader = null;
		try {
			URL[] urls = new URL[1];
			URLStreamHandler streamHandler = null;
			File classPath = new File(Constants.WEB_ROOT);
			String repository = (new URL("file",null,classPath.getCanonicalPath()+File.separator)).toString();
			urls[0] = new URL(null,repository,streamHandler);
			loader = new URLClassLoader(urls);
		}catch(IOException ex) {
			ex.printStackTrace();
		}
		Class myClass = null;
		try {
			myClass = loader.loadClass(servletName);
		} catch (ClassNotFoundException e) {
			e.printStackTrace();
		}
		Servlet servlet = null;
		try {
			servlet = (Servlet) myClass.newInstance();
			servlet.service(request, response);
		} catch (InstantiationException e) {
			e.printStackTrace();
		} catch (IllegalAccessException e) {
			e.printStackTrace();
		} catch (ServletException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}catch(Exception ex) {
			ex.printStackTrace();
		}
	}
}
